Double Feed Induction Machine (DFIM) model in d-q coordinates system Research Paper

Double Feed Induction Machine (DFIM) model in d-q coordinates system. Induction Motomr example of application in practice (variable speed drives) - Research Paper Example The stator is fed by a fixed voltage sources while the rotor is fed by a variable source. Both the stator and the rotor are connected to a three phase power frequency. Mathematically it is convenient to express the three phase voltage concept of DFIM in a dq coordinate system. A (d, q) coordinate system refers to direct and quadrature axes along which current is aligned. A good example that shows the application of an induction machine is the Growian wind turbine that has DFIM as part of its energy regulating system (Anahua et al, 8). A Growian wind turbine which was first used in Germany the year 1977 could be among the first induction models in a (d, q) coordinate system. It came about as a result of three German utilities forming the Growian Company whose function was to design and test a huge wind energy alteration system. It had a variable speed drive with a teetered rotor that had full-span pitch and variable speed force train made of power electronics. The engineers came up with a trade-off between a generator whose frequency converter is in the stator circuit and a doubly fed induction machine whose frequency converter is situated in rotor circuit (Anahua et al, 56). It is characterized by the magnitude of aspect such as amount of voltage, speed, and flux. It is based on the assumptions the stator and rotor voltage acts as the input regulators depending on the flux density distribution, as well as, the electromagnetic condition. Additionally, the rotor current and stator flux also work as the variables. The converters control the rotor voltage to acquire the desired floe of current and the reactive power. The power reaction and resistance is viable in managing the magnetic saturation a transformation is clearly indicated by a mathematical equation. Disconnecting the machine from the grid, lead to a reduction of stator current to zero. This breaks the circuit which is an indication that DFIM model